FNP - HVAC Tech Support

Technical Bulletin
Issue Date April 18, 2005
Horizontal High Performance Fan Coil Unit (Model FN)
Figure 1: Model FNP Plenum Return Concealed
Model FN Horizontal fan coil units are designed to
maximize flexibility of selection and installation.
The units are designed to exceed the stringent quality
standards of the institutional market, while remaining
cost competitive in the light commercial segment of the
market.
Figure 2: Model FNX Exposed Cabinet
Figure 3: Model FNF Free Return
© 2005 Johnson Controls, Inc. 1
Code No. LIT-12011003
www.johnsoncontrols.com

Unit Arrangements
Figure 8: Model FNP Rear Return with Solid
Access Panel
Figure 4: Model FNP Bottom Return
Figure 5: Model FNP Rear Return
Figure 9: Model FNP Bottom Return with Bottom
Ceiling Panel
Figure 10: Model FNF Free Return
Figure 6: Model FNP Bottom Return with
Telescoping Bottom Panel
Figure 11: Model FNM Mixing Box with Bottom and
Rear Return
Figure 7: Model FNM Mixing Box with Top and
Rear Return
2 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Figure 12: Model FNX Double Deflection Supply
Grille and Ducted Rear Return
Figure 15: Model FNX Ducted Supply and Single
Deflection Rear Return Grille
Figure 13: Model FNX Double Deflection Supply
Grille and Single Deflection Bottom Return Grille
Figure 16: Model FNX Ducted Supply and Ducted
Rear Return
Figure 14: Model FNX Double Deflection Supply
Grille and Single Deflection Rear Return Grille
Figure 17: Model FNX Ducted Supply and Single
Deflection Bottom Return Grille
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 3

Physical Data
Table 1: ARI Standard Ratings
Model
FNF
FNP
Unit
Size
ARI 440
Certified Rows FPI
Coil Cooling Capacity Water
Airflow CFM
(Dry Flow)
QT
(BTUH)
QS
(BTUH)
Flow Rate
GPM
WPD
ft wg
Power Input (Watts)
06 • 4 10 700 17800 14000 3.7 1.6 290
08 • 4 10 900 23500 18500 4.9 1.9 410
10 • 4 10 1100 29400 22900 6.0 2.2 470
12 • 4 10 1400 43000 31800 8.7 4.2 560
14 4 10 1750 47100 36250 9.6 3.0 715
16 4 10 2000 51000 41000 10.5 2.0 830
18 4 10 2200 53000 42000 11.0 2.2 850
20 4 10 2300 56000 44000 11.4 2.5 870
Note: Based on 80°F Dry Bulb (DB) and 67°F Wet Bulb (WB) Entering Air Temperature (EAT), 45°F Entering Water
Temperature (EWT), 10°F temperature rise, high fan speed. Motor type is Permanent Split Capacitor (PSC) and motor
voltage is 115/1/60. Airflow under dry coil conditions. All models tested at 0.05” ESP.
Airflow rate CFM on sizes 14 - 20 exceed maximum ratings in Air Conditioning and Refrigeration Institute (ARI) 440 and are
therefore not certified.
Table 2: Heating Capacity
Model
FNF
FNP
Unit
Size
Nominal
CFM
QS
(MBH)
1 Row 2 Row 3 Row 4 Row
GPM
WPD
QS
(MBH)
GPM
WPD
QS
(MBH)
GPM
WPD
QS
(MBH)
06 600 17.5 0.9 1.6 30.2 1.5 1.4 41.7 2.1 1.0 48.3 2.5 0.9
08 800 24.3 1.2 3.2 41.8 2.1 2.6 57.6 2.9 2.0 66.5 3.4 1.6
10 1000 27.8 1.4 0.8 52.4 2.7 4.1 70.5 3.6 1.5 80.6 4.1 1.0
12 1200 34.5 1.8 0.9 61.8 3.2 1.8 86.4 4.4 2.3 98.8 5.1 1.6
14 1400 41.3 2.1 1.7 73.4 3.8 2.6 98.6 5.0 1.4 117.1 6.0 1.8
16 1600 48.1 2.5 2.4 85.1 4.4 3.6 114.5 5.9 1.9 126.5 6.5 0.6
18 1800 54.9 2.8 3.2 96.8 5.0 4.9 130.4 6.7 2.5 144.7 7.4 0.7
20 2000 61.0 3.1 4.1 107.5 5.5 6.1 145.3 7.4 2.4 161.7 8.3 0.9
Note: Based on 70°F DB EAT, 180°F EWT, 40°F temperature drop, high fan speed.
FNX performance data varies from FNP and FNF units. Contact the factory for more information.
GPM
WPD
4 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Table 3: Unit Weight Data
Total
Coil
Rows
Unit Size
Component
06 08 10 12 14 16 18 20
FNF Base Unit 68 (31) 73 (33) 77 (35) 114 (52) 119 (54) 124 (56) 128 (58) 132 (60)
FNP Base Unit 87 (40) 95 (43) 101 (46) 141 (64) 150 (68) 157 (71) 164 (75) 170 (77)
FNP with Mixing Box 119 (54) 132 (60) 144 (65) 189 (86) 204 (93) 217 (99) 229 (104) 246 (112)
FNX Base Unit 137 (62) 146 (66) 158 (72) 202 (92) 219 (99) 228 (103) 240 (109) 250 (113)
1 Row - Dry 5 (2) 6 (3) 7 (3) 8 (4) 10 (5) 10 (5) 11 (5) 12 (5)
1 Row - Wet 7 (3) 9 (4) 10 (5) 11 (5) 14 (6) 14 (6) 16 (7) 17 (8)
2 Row - Dry 11 (5) 13 (6) 14 (6) 16 (7) 20 (9) 20 (9) 22 (10) 24 (11)
2 Row - Wet 14 (6) 18 (8) 20 (9) 23 (10) 27 (12) 28 (13) 32 (15) 35 (16)
3 Row - Dry 16 (7) 19 (9) 21 (10) 24 (11) 30 (13) 30 (14) 33 (15) 36 (16)
3 Row - Wet 21 (10) 27 (12) 30 (14) 34 (15) 41 (19) 42 (19) 48 (22) 52 (24)
4 Row - Dry 21 (10) 25 (12) 29 (13) 33 (15) 40 (18) 40 (18) 44 (20) 48 (22)
4 Row - Wet 27 (12) 35 (16) 41 (19) 46 (21) 54 (25) 56 (25) 64 (29) 69 (31)
5 Row - Dry 26 (12) 30 (14) 34 (16) 38 (17) 42 (19) 46 (21) 50 (23) 54 (25)
5 Row - Wet 33 (15) 39 (18) 45 (21) 51 (23) 57 (26) 63 (29) 70 (32) 77 (35)
6 Row - Dry 32 (15) 38 (17) 43 (19) 49 (22) 59 (27) 61 (28) 67 (30) 71 (32)
6 Row - Wet 42 (19) 53 (24) 61 (28) 69 (31) 80 (36) 85 (39) 97 (44) 103 (47)
7 Row - Dry 38 (17) 42 (19) 48 (22) 54 (25) 60 (28) 66 (30) 72 (33) 78 (35)
7 Row - Wet 49 (23) 56 (26) 63 (29) 70 (32) 77 (35) 84 (38) 91 (42) 98 (45)
8 Row - Dry 43 (20) 49 (22) 55 (25) 61 (28) 67 (30) 73 (33) 79 (36) 85 (39)
8 Row - Wet 55 (26) 63 (29) 71 (32) 79 (36) 87 (40) 95 (43) 103 (47) 111 (50)
Note: Unit weight data is in pounds (kilograms).
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 5

PSC Fan Performance Curves
Fan curves on the following pages depict actual
performance of each motor tap without any additional
fan balance adjustment. Actual capacities that fall
below each curve can be obtained by adding an
adjustment device. Do not run units prior to installation
of downstream ductwork as damage to the motor may
result.
FN fan coil units are equipped with PSC motors with
three separate windings (High, Medium, and Low) that
provide variable horsepower outputs. Most often, size
selections are conservative and actual CFM
requirements and/or external static pressure
requirements are lower than those specified. In this
case, the unit fan motor can run at low or medium tap,
substantially reducing the operating cost of the unit.
All fan curves are for 115/1/60 motors and include
pressure losses for a cabinet, electric heater, and 3- or
4-row coil. Plenum units include a clean 1” throwaway
filter. For other coil configurations, adjust performance
curves based on pressure losses for the coils.
For additional high static pressure applications and
rating points, contact the factory.
Figure 18: Model FNF Free Return Size 06
Figure 19: Model FNF Free Return Size 08
Figure 20: Model FNF Free Return Size 10
6 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Figure 21: Model FNF Free Return Size 12
Figure 24: Model FNF Free Return Size 18
Figure 22: Model FNF Free Return Size 14
Figure 25: Model FNF Free Return Size 20
Figure 23: Model FNF Free Return Size 16
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 7

Figure 26: Model FNP Plenum Return Size 06
Figure 29: Model FNP Plenum Return Size 12
Figure 30: Model FNP Plenum Return Size 14
Figure 27: Model FNP Plenum Return Size 08
Figure 31: Model FNP Plenum Return Size 16
Figure 28: Model FNP Plenum Return Size 10
8 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Figure 32: Model FNP Plenum Return Size 18
Figure 33: Model FNP Plenum Return Size 20
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 9

Figure 34: Model FNX Exposed Cabinet Size 06
Figure 37: Model FNX Exposed Cabinet Size 12
Figure 35: Model FNX Exposed Cabinet Size 08
Figure 38: Model FNX Exposed Cabinet Size 14
Figure 36: Model FNX Exposed Cabinet Size 10
Figure 39: Model FNX Exposed Cabinet Size 16
10 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Figure 40: Model FNX Exposed Cabinet Size 18
Figure 41: Model FNX Exposed Cabinet Size 20
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 11

Electronically Commutated Motor (ECM)
Fan Performance Curves
The fan curves on the following pages depict actual
performance at the maximum speed of the ECM
motor. Depending upon external static pressure, flow
rates are achievable anywhere within the curve
boundary by adjusting the motor speed through the
electronic interface control board.
Once the electronic interface control board is set to the
desired flow rate, airflow rates will be constant for
varying degrees of external static pressure caused by
filter loading or other duct system variables.
Fan curves compensate for pressure losses of the unit
cabinet, coil rows, filter loading, and other optional
accessories.
ECM motors operate using a rectified Alternating
Current (AC) power source that is converted to a
non-sinusoidal Direct Current (DC) power wave form.
Harmonic distortion may occur and circulate on the
power distribution system. Circulating harmonic
currents are potentially additive on the neutral
conductors of 3-phase, 4-wire Wye distribution
systems. Neutral conductors must be engineered to
account for the additional current (amperes)
encountered.
Figure 43: Model FNP Size 08 with 1/3 hp
ECM Motor
Figure 44: Model FNP Size 10 with 1/3 hp
ECM Motor
Figure 42: Model FNP Size 06 with 1/3 hp
ECM Motor
Figure 45: Model FNP Size 12 with (2) 1/3 hp
ECM Motors
12 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Table 4: ECM Airflow
Unit
Size
Factory Set
CFM Range
CFM Min. Max.
06 600 200 700
08 800 300 900
10 1000 300 1000
12 1200 400 1500
14 1400 600 1800
16 1600 600 1900
18 1800 600 2000
20 2000 600 2000
Figure 46: Model FNP Size 14 with (2) 1/3 hp
ECM Motors
Figure 47: Model FNP Size 16 with (2) 1/3 hp
ECM Motors
Figure 48: Model FNP Sizes 18/20 with (2) 1/3 hp
ECM Motors
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 13

Motor, Fan, and Sound Data
Table 5: Motor and Fan Data
Unit
Size
06
08
10
12
14
16
18
20
Notes:
Fan
Speed
Motor hp
Amperes @ 120/1/60 Amperes @ 208-230/1/60 Amperes @ 277/1/60
(Quantity)
Fan
ECM ECM ECM
# PSC
PSC
PSC
PSC
ECM
FLA
3-Phase
Neutral
Current
FLA
3-Phase
Neutral
Current
High (1) 1/6 2.6 1.1 0.9
Medium (1) 1/8 (1) 1/3 1 2.1 5.0 13.2 0.9 2.8 5.9 0.8
Low (1) 1/10
1.8
High (1) 1/4 3.8 1.6 1.3
Medium (1) 1/6 (1) 1/3 1 3.3 5.0 13.2 1.0 2.8 5.9 0.8
Low (1) 1/8
2.6
High (1) 1/4 4.9 2.2 1.9
Medium (1) 1/5 (1) 1/3 1 4.1 5.0 13.2 1.5 2.8 5.9 1.2
Low (1) 1/6
3.2
High (2) 1/6 5.2 2.2 1.8
Medium (2) 1/8 (2) 1/3 2 4.2 10.0 26.4 1.8 5.6 11.8 1.6
Low (2) 1/10
3.6
High (2) 1/4 7.6 3.2 2.6
Medium (2) 1/6 (2) 1/3 2 6.6 10.0 26.4 2.0 5.6 11.8 1.6
Low (2) 1/8
5.2
High (2) 1/4 9.8 4.4 3.8
Medium (2) 1/5 (2) 1/3 2 8.2 10.0 26.4 3.0 5.6 11.8 2.4
Low (2) 1/6
6.4
High (2) 1/4 9.8 4.4 3.8
Medium (2) 1/5 (2) 1/3 2 8.2 10.0 26.4 3.0 5.6 11.8 2.4
Low (2) 1/6
6.4
High (2) 1/4 9.8 4.4 3.8
Medium (2) 1/5 (2) 1/3 2 8.2 10.0 26.4 3.0 5.6 11.8 2.4
Low (2) 1/6
Motor electrical data is nameplate data. Actual data will vary with application.
Motors are nameplated for 208-230/1/60. Data is set at 230 volts.
ECM motors operated on 208/1/60 power result in reduced airflow.
6.4
0.6
0.8
1.1
1.2
1.6
2.2
2.2
2.2
0.7
0.7
0.8
1.4
1.4
1.6
1.6
1.6
FLA
3-Phase
Neutral
Current
2.6 5.4
2.6 5.4
2.6 5.4
5.2 10.8
5.2 10.8
5.2 10.8
5.2 10.8
5.2 10.8
14 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Table 6: Sound Data
Unit
Size
06
08
10
12
14
16
18
20
Notes:
Fan
Speed
Unit
SCFM
Casing Radiated
Octave Band Sound Power Levels, dB
Free Inlet and Casing Radiated
Octave Band Sound Power Levels, dB
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
High 610 70 68 63 58 57 52 46 42 72 71 63 60 60 57 52 47
Medium 540 66 63 57 55 52 47 40 36 71 68 59 58 57 54 48 43
Low 475 58 59 53 53 48 43 35 32 65 64 57 56 54 51 44 40
High 790 66 64 62 59 58 53 47 42 68 68 63 61 61 58 53 47
Medium 750 62 60 58 56 54 48 42 37 67 65 60 59 59 55 50 44
Low 680 58 57 54 53 50 43 36 32 65 62 57 57 56 52 45 40
High 915 67 65 63 60 59 54 47 44 69 69 64 62 62 59 53 49
Medium 835 63 62 58 57 55 50 44 38 68 67 60 60 60 57 55 45
Low 780 59 58 55 54 52 45 37 33 66 63 58 58 58 54 46 41
High 1310 70 68 65 60 60 55 51 47 72 72 66 62 63 60 57 52
Medium 1175 65 64 60 57 56 50 45 41 70 69 63 60 61 57 53 48
Low 1050 63 61 56 55 50 45 39 35 70 66 59 58 57 53 49 43
High 1650 69 67 68 63 62 57 52 48 71 71 68 65 65 62 58 53
Medium 1400 65 64 64 61 59 53 48 44 70 69 66 64 64 60 56 51
Low 1145 62 62 60 59 55 49 44 39 70 67 64 63 62 58 53 47
High 1900 70 69 68 63 63 58 53 40 72 72 68 65 66 63 59 55
Medium 1770 66 65 64 61 60 54 49 45 71 70 66 64 65 61 57 52
Low 1610 63 62 60 59 56 50 45 41 71 67 64 63 62 59 54 48
High 2000 70 67 67 63 63 59 54 50 72 71 68 65 66 64 60 55
Medium 1850 66 64 65 61 60 55 51 46 71 69 67 64 65 62 59 53
Low 1700 63 62 59 59 55 51 45 42 71 67 62 62 62 59 54 58
High 2140 71 68 66 63 63 60 56 52 72 71 67 65 66 65 62 56
Medium 1980 67 64 63 61 59 56 52 47 72 69 65 63 64 63 59 53
Low 1800 64 61 58 58 55 52 46 41 71 66 61 61 61 60 55 48
Sound data tested in accordance with ARI 260-01.
Sound levels are expressed in decibels, dB RE: 1 x 10 -12 watts.
Total sound power level data is based on Model FNP with fan CFM at corresponding fan speed with 115/1/60 volt motor,
4-row coil, 1” throwaway filter, 0.25” external static pressure, and standard rated internal pressure losses.
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 15

Dimensional Data
Drawings are not to scale and are not for installation purposes.
Figure 49: Model FNF – Free Return Units
16 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Figure 50: Model FNF – Free Return Units
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 17

Figure 51: Model FNP – Plenum Units
18 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Figure 52: Model FNP – Plenum Units
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 19

Figure 53: Model FNM with Mixing Box
20 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Figure 54: Model FNX – Exposed Cabinet Units
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 21

Figure 55: Model FN – Telescoping/Filter and Solid Bottom Access Panels
22 Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin

Controls Group
507 E. Michigan Street
P.O. Box 423
Milwaukee, WI 53201
Published in U.S.A.
www.johnsoncontrols.com
Horizontal High Performance Fan Coil Unit (Model FN) Technical Bulletin 23